I can't BELIEVE it
My SOED-CD came up with come-uppance, hyphenated, and defined it as "one's deserts for misbehaviour"
YES! The definition says desert ... and I was equally surprised to discover they are right about desert....Here I was going along thinking desert was an arid, sandy place and SOED says it is "Deserving, being worthy of reward or punishment" .... etc
And another mnemonic bites the dust ...
wow